package com.example.util;


import java.io.File;
import java.io.FileNotFoundException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import org.springframework.util.ResourceUtils;

@Component
@Slf4j
public class SpringUtil implements ApplicationContextAware {

  private static ApplicationContext applicationContext;

  public static final File absWebRoot = getAbsWebRoot();
  private static File getAbsWebRoot()  {
    File path = null;
    try {
      String classPathStr = ResourceUtils.getURL("classpath:").getPath();
      log.info("classPath:"+classPathStr);
      File classPath = new File(classPathStr);
      path = new File(classPath.getParentFile().getParent()+"/static/");
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    }
    if(!path.exists()) path = new File("static");
    log.info("static path:"+path.getAbsolutePath());
    return path;
  }

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    if(SpringUtil.applicationContext == null) {
      SpringUtil.applicationContext = applicationContext;
    }
    System.out.println("---------------SpringUtil--------");

    System.out.println("========ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext="+SpringUtil.applicationContext+"========");

    System.out.println("---------------------------------------------------------------------");
  }

  //获取applicationContext
  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  //通过name获取 Bean.
  public static Object getBean(String name){
    return getApplicationContext().getBean(name);
  }

  //通过class获取Bean.
  public static <T> T getBean(Class<T> clazz){
    return getApplicationContext().getBean(clazz);
  }

  //通过name,以及Clazz返回指定的Bean
  public static <T> T getBean(String name,Class<T> clazz){
    return getApplicationContext().getBean(name, clazz);
  }

}